The narrator’s self-dissection experiment is the story element that most clearly categorized "Exhalation" as a work of science fiction. Option A is correct.
"Exhalation" is classified under science fiction genre. It was created by Ted Chiang and was first launched in 2008. Besided it won the famous “Hugo Award” in the year 2009.
Science fiction is a genre of speculative fiction that has been known as the "literature of ideas". It generally deals with imaginative and futuristic ideas including advanced science and technology, time travel, parallel universes, fictional worlds, space exploration, and extraterrestrial life.